package io;

import java.io.*;

public class BOSDemo {
    public static void main(String[] args)throws IOException {
        FileInputStream fis = new FileInputStream("ppt.pptx");
        BufferedInputStream bis = new BufferedInputStream(fis);

        FileOutputStream fos = new FileOutputStream("ppt_p2.pptx");
        BufferedOutputStream bos = new BufferedOutputStream(fos);

        int d;
        long start = System.currentTimeMillis();
        while ((d = bis.read())!=-1){
            bos.write(d);
        }
        long end = System.currentTimeMillis();
        bos.close();
        bis.close();
    }
}
